[Xastir] MYSQL2300

[John Fidler]

I am using MYSQL2300 to get data from my WS2300 station. The information 
for wind_angle is incorrect. There is a bug in the setup file for the 
mysql table. The table, weatherdump.sql, needs to be modified. I believe 
rel_pressure may also have an error according to a bug report on the 
open2300. I changed the table info using alter table when connected to 
mysql. The data is now correct and displays the correct wind angle in 
XASTIR.